Septic and Sewer · Septic Systems
Drain Field Replacement Cost, Permits and Who Does the Work
Removing an existing drain field and installing a new one, typically handled by a septic contractor.
Model reviewed August 2026
Typical cost
$11,000
National, standard scope
Range
$4,500 – $28,000
Low to high scope
Trade
Septic contractor
DIY difficulty 1/5
Permit
Usually required
Plan on a permit and inspection
Do I need a permit for drain field replacement?
Usually yes
Drain Field work at this scope touches structure, life safety or a permitted trade in most jurisdictions, so a permit and inspection are normally required. Always confirm with the building department that has jurisdiction over your address.
Cost breakdown
Modeled national figures for a standard single-family job.
| Low endSimple scope, easy access, no surprises | $4,500 |
|---|---|
| TypicalWhat most homeowners pay | $11,000 |
| High endLarge scope, upgrades or difficult conditions | $28,000 |
| Job type | Project |
| Cost varies by location | High |
Go deeper
This job has full cost, permit and location coverage.
Related jobs
Related projects homeowners often plan together.
Also searched as
You may also hear this called:
replace drain field · new drain field · drain field replacement cost · drain field swap
Frequently asked questions
How much does drain field replacement cost?
Most homeowners pay between $4,500 and $28,000, with $11,000 typical for a standard single-family job. Figures are modeled national estimates, not quotes.
Do I need a permit for drain field work?
Yes — in most jurisdictions this job is permitted and inspected. Check your local building department before work starts.
Who does drain field replacement?
A septic contractor handles this job. DIY difficulty is rated 1/5 (5 = very DIY friendly).
Does the price change much by location?
Yes. Across the states we price, the typical cost ranges from $9,900 to $14,410 — about a 46% spread — driven by labor rates, code requirements and permit fees.